{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:54.348655", "data_source": "ERA5", "website": "http://wexa.jamstec.go.jp", "Author": "Patrick Martineau"}, "event_id": {"name": "Event ID", "description": "A unique identifier based on: beginning_date, end_date, longitude, and latitude", "value": "2026-Jan-25_to_2026-Jan-27_303.5_3.5"}, "event_label": {"name": "Event label", "description": "Integer-valued grid identifier that uniquely labels each detected extreme event in space and time, consistent with the corresponding labels stored in the NetCDF dataset.", "value": 2026010000760}, "status": {"name": "Status", "description": "An ongoing event denotes an event that lasts up to the latest data available. These events are subject to change as newer data is added.", "value": false}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "January 25 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 27 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "figures_available": {"name": "Figures available", "description": "True if figures were pre-generated for this event", "value": true}, "detection_var": {"name": "Detection variable", "description": "Variable used for the detection scheme", "value": "t2m"}, "event_type": {"name": "Event type", "description": "Type of the event detected", "value": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 67951.46455369968}, "countries_affected": {"name": "Countries affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the countries affected by an event during its lifetime.", "value": ["Brazil", "Guyana", "Suriname"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "America", "America"]}, "oceans_affected": {"name": "Ocean basins affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the ocean basins affected by an event during its lifetime.", "value": []}, "center_lat": {"name": "Center latitude", "description": "Latitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 3.5}, "center_lon": {"name": "Center longitude", "description": "Longitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 303.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "303.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 301.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 303.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 1.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 3.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-59.18, 2.68], [-59.03, 3.03], [-58.5, 3.25], [-58.25, 3.15], [-58.18, 3.18], [-58.03, 3.53], [-57.68, 3.68], [-57.53, 4.03], [-57.0, 4.25], [-56.75, 4.15], [-56.5, 4.25], [-55.97, 4.03], [-55.75, 3.5], [-55.96, 3.0], [-55.75, 2.5], [-55.85, 2.25], [-55.75, 2.0], [-55.97, 1.47], [-56.32, 1.32], [-56.47, 0.97], [-57.0, 0.75], [-57.25, 0.85], [-57.32, 0.82], [-57.47, 0.47], [-58.0, 0.25], [-58.25, 0.35], [-58.5, 0.25], [-59.03, 0.47], [-59.18, 0.82], [-59.53, 0.97], [-59.75, 1.5], [-59.65, 1.75], [-59.75, 2.0], [-59.53, 2.53], [-59.18, 2.68]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.South-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-01-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-59.75, 2.0], [-59.52999999999997, 2.53], [-59.18000000000001, 2.68], [-59.02999999999997, 3.03], [-58.5, 3.25], [-58.25, 3.15], [-58.18000000000001, 3.18], [-58.02999999999997, 3.53], [-57.68000000000001, 3.68], [-57.52999999999997, 4.03], [-57.0, 4.25], [-56.75, 4.15], [-56.5, 4.25], [-55.97000000000003, 4.03], [-55.75, 3.5], [-55.95999999999998, 3.0], [-55.75, 2.5], [-55.85000000000002, 2.25], [-55.75, 2.0], [-55.97000000000003, 1.47], [-56.31999999999999, 1.32], [-56.47000000000003, 0.97], [-57.0, 0.75], [-57.25, 0.85], [-57.31999999999999, 0.82], [-57.47000000000003, 0.47], [-58.0, 0.25], [-58.25, 0.35], [-58.5, 0.25], [-59.02999999999997, 0.47], [-59.18000000000001, 0.82], [-59.52999999999997, 0.97], [-59.75, 1.5], [-59.64999999999998, 1.75], [-59.75, 2.0]]]]}, "2026-01-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-59.75, 2.0], [-59.52999999999997, 2.53], [-59.18000000000001, 2.68], [-59.02999999999997, 3.03], [-58.5, 3.25], [-58.25, 3.15], [-58.18000000000001, 3.18], [-58.02999999999997, 3.53], [-57.68000000000001, 3.68], [-57.52999999999997, 4.03], [-57.0, 4.25], [-56.75, 4.15], [-56.5, 4.25], [-55.97000000000003, 4.03], [-55.75, 3.5], [-55.95999999999998, 3.0], [-55.75, 2.5], [-55.85000000000002, 2.25], [-55.75, 2.0], [-55.97000000000003, 1.47], [-56.31999999999999, 1.32], [-56.47000000000003, 0.97], [-57.0, 0.75], [-57.25, 0.85], [-57.31999999999999, 0.82], [-57.47000000000003, 0.47], [-58.0, 0.25], [-58.25, 0.35], [-58.5, 0.25], [-59.02999999999997, 0.47], [-59.18000000000001, 0.82], [-59.52999999999997, 0.97], [-59.75, 1.5], [-59.64999999999998, 1.75], [-59.75, 2.0]]]]}, "2026-01-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-59.75, 2.0], [-59.52999999999997, 2.53], [-59.18000000000001, 2.68], [-59.02999999999997, 3.03], [-58.5, 3.25], [-58.25, 3.15], [-58.18000000000001, 3.18], [-58.02999999999997, 3.53], [-57.68000000000001, 3.68], [-57.52999999999997, 4.03], [-57.0, 4.25], [-56.75, 4.15], [-56.5, 4.25], [-55.97000000000003, 4.03], [-55.75, 3.5], [-55.95999999999998, 3.0], [-55.75, 2.5], [-55.85000000000002, 2.25], [-55.75, 2.0], [-55.97000000000003, 1.47], [-56.31999999999999, 1.32], [-56.47000000000003, 0.97], [-57.0, 0.75], [-57.25, 0.85], [-57.31999999999999, 0.82], [-57.47000000000003, 0.47], [-58.0, 0.25], [-58.25, 0.35], [-58.5, 0.25], [-59.02999999999997, 0.47], [-59.18000000000001, 0.82], [-59.52999999999997, 0.97], [-59.75, 1.5], [-59.64999999999998, 1.75], [-59.75, 2.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.3650789366745357}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.6687993079329422}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.225350489760956, 23.199364309599957, 23.521577222419523]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.320347086588583, 22.366204833984398, 22.581587727864587]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.7333953052501891, -1.7812271244602351, -1.4917754940884023]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.936775599897146, -2.3650789366745357, -2.0080207770803895]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.045348676240127, -2.1081240242491828, -1.7822662517138057]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.504303026422568, -3.0660789552217644, -2.431600214513712]}}